4.5 Gbps high-speed real-time physical random bit generator.
4.5 Gbps high-speed real-time physical random bit generator.
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DOI：
10.1364/oe.21.020452
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发表时间：
2013-08
期刊：
影响因子：
3.8
通讯作者：
Anbang Wang;Pu Li;Jianguo Zhang;Jianzhong Zhang;Lei Li;Yuncai Wang
中科院分区：
文献类型：
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作者：
Anbang Wang;Pu Li;Jianguo Zhang;Jianzhong Zhang;Lei Li;Yuncai Wang
本文报道了一种基于混沌激光的高速实时物理随机比特发生器的原型。混沌激光器由光纤外腔结构中具有光反馈的半导体激光器组成。通过微分比较，将混沌激光强度信号量化为二值流，使其振幅分布相对于零均值对称。在混沌信号的两个原始二进制流及其延迟信号之间采用异或门运算，克服了混沌激光固有的外腔共振所引起的弱周期性的影响。该样机经过异或运算后，无需任何脱机处理程序即可实时生成单个快速随机比特流。它的比特率可以通过触发时钟方便地连续调到4.5 Gbps。实验结果表明，该发生器具有高质量的随机性，并得到了三标准差准则和行业基准统计检验的验证。
We report a prototype of high-speed real-time physical random bit generator based on a chaotic laser. The chaotic laser consists of a semiconductor laser with optical feedback in fiber external cavity configuration. The chaotic laser intensity signal is quantized into binary stream by differential comparison which makes the amplitude distribution symmetric with respect to zero mean value. An exclusive-OR gate operation between two raw binary streams from the chaotic signal and its delayed signal is used to overcome the influences of the weak periodicity induced by the external cavity resonance inherent in the chaotic laser. After exclusive-OR operation, the prototype can generate a single fast random bit stream in real time without any off-line processing procedures. Its bit rate can be handily and continuously tuned up to 4.5 Gbps by a trigger clock. Experiment results demonstrate that our generator possesses high-quality randomness with verified by the three-standard-deviation criterion and industry-benchmark statistical tests.